@NexCarter Someone left at least two of these in the swap shop and they contain Americium 241. They're not immediately dangerous (depending on the condition of the sources inside), but are dangerous if disassembled.

Edit: I have two of them that I've sealed in plastic bags and locked up in the back of my truck. Next week I'll investigate if we have a waste stream at work that I can put them into. I work in civil nuclear.